7351 Series Digital Multimeter Operation Manual
6.2.2 Precautions in Use of GPIB
6-4
6.2.2
Precautions in Use of GPIB
1. Do not use too long a bus cable to connect any instrument or controller. Ensure that the total cable
length does not exceed 20 m. ADC CORPORATION uses the following cables as the standard bus
cable.
2. Bus cables have piggyback connectors. A piggyback connector has both a male connector and a
female connector by itself. The male and female connectors can be stacked on top of each other.
When connecting bus cables, do not stack three or more connectors. Secure the connectors with the
clamping screws.
3. Check the power requirements, grounding conditions, and setting conditions of each device before
turning on the power of each device.
Ensure that all devices on the bus are turned on. If any device on the bus is not turned on, the system
may not operate correctly.
4. Connecting or disconnecting cables
Turn off all devices on the bus before connecting or disconnecting GPIB cables. Check that the chas-
sis of the devices on the bus are connected to each other and to the ground before connecting or dis-
connecting any GPIB cables.
5. ATN interruption while transmitting a message
If an ATN interruption request is received on the bus while the messages are transmitted among de-
vices, the request is allowed and previous status is cleared.
6. Do not connect the controller when using the Talk-Only mode.
7. Up to 255 characters in one transmission can be recognized as a program command. If the program
command exceeds 255 characters, an error occurs.
8. Retain LOW on the REN line for 5 ms or more after the program command has been sent.
9. The next command can be received before the execution of the INI(ADC),INITiate(SCPI), or *TRG
command is complete.
To delay the execution of the next command until the current command is complete, use the *OPC,
*OPC?, or *WAI command. Describe the *OPC, *OPC?, or *WAI command at the end of a line in
the program.
Example
“:INIT;*OPC”
“:INIT;*OPC?”
“:INIT;*WAI”
Table 6-2 Standard Bus Cable
Length
Name
0.5 m
408JE-1P5
1 m
408JE-101
2 m
408JE-102
4 m
408JE-104
